Photographic-printing apparatus.



W. C. HUEBNEH.

PHooeR/wmc PRIN'HNG APPARATUS.

PPLICATiOH FILED: FR.29, X915.

Patented Feb., 20, 1917,

3 SHEETSHSHEET I.

. @n ww om m 3 SHEETS-SHEET 2.

'1f Main... if f4 l W. C. HUEBNEH PHomGRAF-mc Hmmm APPARATUS,

APPLICATIGH FILED APR-291mm.

ITED S.. l

TATFS P ATENT 0 #M FFICE titi ' vals along the end bars 13.

Sel

plane parallel with thesensitized tibns in a surface.

The plate holder A may be removably lretained in place on the supporting traine bypins or studs which project from the face of the supporting frame C into registering holes 11 in the plate holder A, 'or by any other surtay `le means adapted to hold the plat@ holden7 A in a predetermined position on the supporting frame and allow'it to be quickly and easily placed in position on and removed frein the supporting traine.

The plate holde comprises `a rectangular frame compose of longitudinal or side. bars 12 connected yfend bars 13, relatively adjustable clamping or securing bars .14 and .15 to which the opposite edges of the sensitized plate B are adapted to be secured, and means for stretching orl tightening the sensitized plate. its shown, the securing bar 14 isfefpivoted at its ends to guide blocks 1G which surround and are adapted to slide on the end bars 13 of the holder` frame, and the other securing bar 15 isl likewise pivoted at its ends to guide blocks 17 slidably engaging the end bars 13 oit the holder traine. rlhe securing bar 14C is adapted to be secured in different positions on the end bars`13 nearer to or. farther from the other securing bar, as may be necessary to suit sensitized plates of different widths, such for instance., as screws 18 carried by the guide blocks 16' and adapted to Aent-er seats or depressions 19 provided at inter- The other securing bar 15 is preferably moved on the end bars 13 toward and from the securing bar 14 by adjusting screws 20 which extend par-- allel with the end bars and are journaled 'and held from endwise movement in bear ings 21 and 22 on the holder frame and 'turn in sorew-threaded holes in the guide blocks .17 of the securing bar 15. After the edges of the sensitized plate have been sccured'to the two securing barslll and 15,y the plate can be stretched or made taut by turning the adjusting screws to move the bar 15 away from the bar lei: The pivotal joints between the securing bars 14e and 15 and their guide blocks enable the to some extent without causing .the guides to bind on the end bars 13. The adjusting screws 20 can therefore be operated singly without causing the bars to bind, and the bars can be adjusted out of parallelism, it' necessary, to properly stretch the sensitized plate. The securing' bar 14 can be set so as to locate the edge of theprinting plate secured thereto in a relation to the plate holder and the appar tus in which the plate is to be used, and the plate can then be stretched withoi.it disturb ing this relation by the proper adjustment of the other securing bar 15.

2, represents screws which conby suitable means,

bars to swing angularly rmoved from a predetermined requiredparallel bars Leraars.

neet the securing bars 14 and 15 between their ends to the adjacent bars 12 of the holder frame for preventing the securing bars from springing inwardly between their ends and thus permitting the sensitized plate to sag between its ends. The screws 23 shown are passed through smooth holes in the securing bars. Screws 23 of diferent lengths can be used with plates of different widths, so that the screws will not project to an objectionable extent beyond the securing bars. rllhese screws can be used or not, as required, or other suitable means substituted therefor.

Each of the securing bars 14 and 15 has secured on its outer or front face, which preferably inclines rearwardly from its inner edge, a clamping strip 25, between which and the facel of the securing bar the edge of the sensitized plate is adapted to be inserted, the clamping strip being preferably rabbeted to form a receiving recess 26, see Figs. 10 and 11, for the edge of the sensitized plate. rlhe edge of the sensitized plate is gripped between the clamping strip 25 and a series of eccentrics or rollers 27 which are located atv intervals along the securing bar in pockets therein. The rollers have eccentric journals 29 at their ends which are seated in bearings formed by a slot 30 which extends lengthwise in the front side or the securing bar intersecting the rollerv pockets. The rollers are placed in their pockets before the clamping strip 25 is fastened on the bar and are retained in place by this strip. Each roller has a pin or handie 3l extending rearwardly therefrom by which it can be turned to grip and release the sentitzed plate. could be provided with struction for clamping or securing the edge of the sensitized plate thereto, but the described clarnping means oan'be quickly and easily operated to grip and release the plate, they are very efficient in action, and are of simple and durable construction.

lf claim as my invention:

j 1. A. portable holder for a printing plate .having a sensitized surface, said holdercomprising an open frame, and vmeans carried by the frame for securing and stretching the sensitized plate thereon, whereby said holder is adapted to be placed in and rephotographic printing apparatus with the sensitized plate in place thereon, provision being made for placing said holder in a predetermined position in the apparatus.

2. A portable holder for a printing plate having'a sensitized surface, said holder comprising an open frame, and substantially means of other conprovided with means for securing the sensitized late thereto one of said bars bein adf v 7 1 ,c 4

justaole on the fr `nie towaroL and troni the The securing bars los mounted on said frame and other bm', szrirlvhohler being ariaped lo be plneerl in :md removed from a phogographie printing; :ip ijurzifim with the sensiized plate in plure thereon.

2:3. The eouihiunlirm with 2L supporlihg lraxhie, nl: :i poi-table holder for '.1 priming pluie having :i senr'` lied surface, saidv holder emhprisiig im open iframe, :uid means Car rierl Lhereby ler aeeilrulg nml tighienihg the Sensiizeil pl: l1 filler-eeh, whereby lhe lmldef: xrbh the :sensi `Zeri plate in place ihiiremi uilzip'eil LU be plum-.rl on hurl removed from. Suhl :Supporting frame, and eopeifuiug pur's 011 Said summa-ting 'frame unil plate holiler l'm holding the. hitler in n preilel'ermined pusition ou he laure u'l Suid suppuriirg lrzmm -l. The combination wil-h a supporti frame, olf n, portable holder lor a printing plate having :l semhtizefl surl'nee, said, holder emhprismg un open rume, mul menus enrrieil therebv for seeming null tightening the lsensilir/ed pleite thereon, whereby the holfler with the seusiiizerl plate in place thereon Mayte/ll lil he placed, effi :mil remfrved from said supporting 'lr-mue, @met s'uels proie Ling; :from one el' Suhl lfrzuhes. :mi zrdziper to enter holes in he other 'frame the plate holder ii,

heidi a. gyrexiieermihm minima on the supporting mime.

il. A, holder ler :i printing plete comprising an open frame.I Subshminlly parallel eeuring bars mounted on seid frame :mel p riiled with means 'for seem-i115; lle primiug plete hereo, guide blocks to w o' said bars is p'votefl :rt s ende zu :ire sliflnbly momie@ 0h l h justihg @fli4l hat iowa une from Smid oher hieh bnr, und means for Securing said ajmtabie bm: in :gli risenl positions, lo

6. jl, holder )r :1 printing p it@ Compris;i

' eomieeted lz im uiwu il'zmle eoiipeswl o :md emi barsf substantially z Serurhzg liars, :lillziblj mmmtefl 0:1 Said end huiuml Lirm'irlerl willi menus 'for securing .15, he printing plate lhcrf l, means for securing' me el' :raid securing bars t0 Said @mi bers.: iii dill'ereu xeifl phsiions relative to l. ,fr holder ''m :i priirfiug plate emupris- 'me nu open framing 'menus hererm fer securing (me edge ol' the prmtur plete, :i Se- 55.

curing bur lfm' 'he epposi edge @fr #bhe print-ingr pluie, guide blocks te Whieh sala brrr is pimted :uid which ure sliiilnhly melun? ell wh Sailfl frame9 nml. hrezm '.for moving said guide bier-,lis il'er tightening the printing 5g plaie.

holder u printing plate comprising nu open 'lrx thereon for secar ine; one ed@ seemL inigjhnr le;

le7 inerme* r :siriri bm.' 'for he i i 

